Source : Webster's Revised Unabridged Dictionary (1913)

Exacuate \Ex*ac"u*ate\, v. t. [L. exacure; ex out (intens.) +
   acuere to make sharp.]
   To whet or sharpen. [Obs.] --B. Jonson. -- {Ex*ac`u*a"tion},
   n. [Obs.]